Global Patent Index - EP 3644031 A1

EP 3644031 A1 20200429 - WAVELENGTH METER

Title (en)

WAVELENGTH METER

Title (de)

WELLENLÄNGENMESSER

Title (fr)

COMPTEUR DE LONGUEUR D'ONDE

Publication

EP 3644031 A1 20200429 (EN)

Application

EP 18202417 A 20181024

Priority

EP 18202417 A 20181024

Abstract (en)

An apparatus is disclosed, comprising an input means for receiving an optical signal from an optical source. The apparatus may also comprise a first interferometer means for receiving the optical signal from the input means and outputting a first output signal, the first interferometer means comprising a first reference arm and a first delay arm and a second interferometer means for simultaneously receiving the optical signal from the input means and outputting a second output signal, the second interferometer means comprising a second reference arm and a second delay arm. At least one of the second reference and the second delay arms of the second interferometer means being configured to have a different thermo-optic property than the corresponding first reference and the first delay arm of the first interferometer means. The apparatus may also comprise means for determining a wavelength of the optical signal based on the first and second output signals.

IPC 8 full level

G01J 9/02 (2006.01)

CPC (source: EP)

G01J 9/0246 (2013.01)

Citation (search report)

  • [YA] WO 2016010528 A1 20160121 - NOKIA TECHNOLOGIES OY [FI], et al
  • [YA] EP 3306836 A1 20180411 - JUNIPER NETWORKS INC [US]
  • [A] WO 2009105633 A2 20090827 - LUNA INNOVATIONS INC [US], et al
  • [XAYI] CHAO XIANG ET AL: "Integrated chip-scale Si_3N_4 wavemeter with narrow free spectral range and high stability", OPTICS LETTERS, vol. 41, no. 14, 15 July 2016 (2016-07-15), US, pages 3309, XP055580113, ISSN: 0146-9592, DOI: 10.1364/OL.41.003309

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3644031 A1 20200429; EP 3644031 B1 20230104; WO 2020083626 A1 20200430

DOCDB simple family (application)

EP 18202417 A 20181024; EP 2019076878 W 20191004